keithw/mosh — pull request #132 by kmcallister (2012-04-11 02:07:40+00:00)
Title: configure.ac: Fix protoc check

`AC_MSG_ERROR` inside the variable assignment doesn't work properly. We get
output like

checking for protoc... ./configure: line 4524: is: command not found
no

and then the build continues (and fails) with `PROTOC=""`.